feat(map): add map announcement

[Joltras]

Proposed changes

We got a map from an external builder, so we should display the map's name and builders in the chat.

Types of changes

What types of changes does your code introduce to this project?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of
them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before
merging your code.

• I have read the CONTRIBUTING.md
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[github-actions]

Job Summary for Gradle

Build PR :: build

Gradle Root Project	Requested Tasks	Gradle Version	Build Outcome	Build Scan®
Cygnus	build test	9.6.1	❌

[github-actions]

Job Summary for Gradle

Build PR :: build

Gradle Root Project	Requested Tasks	Gradle Version	Build Outcome	Build Scan®
Cygnus	build test	9.6.1	❌

[github-actions]

Test results

124 files  124 suites   52s ⏱️
252 tests 247 ✅ 4 💤 1 ❌
467 runs  459 ✅ 6 💤 2 ❌

For more details on these failures, see this check.

Results for commit a617bdd.